7-13 할리데이 11판 솔루션 일반물리학

$$ \begin{cases} k&=130\ut{N/m}\\ \Delta x&=5.00\ut{m} \end{cases} $$ $$ F=kx, $$ $$W_{i\rarr f}=\int_{i}^{f} \vec F \cdot \dd \vec S,$$ $$ \begin{aligned} W&=\int_{0}^{x} kx \cdot \dd x\\ &=\frac{1}{2}kx^2\\ &=1625\ut{J}\\ &\approx 1.63\times10^3\ut{J}\\ &\approx 1.63\ut{kJ}\\ \end{aligned} $$